|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Iridaceae||View Description||Dichotomous Key|
|Genus: Iris||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Iris thompsonii R.C. Foster
Habit: Rhizome 4--6 mm diam. Stem: unbranched, 10--25 cm. Leaf: basal 3--4 mm wide, base generally green; cauline 1--3, bract-like basally, leaf-like near stem tip. Inflorescence: flowers 1(2); lowest 2 bracts opposite, enclosing perianth tube, outer 3--8 cm, 9--18 mm wide. Flower: perianth pale lavender to violet purple or occasionally white to gray, tube 17--26 mm, funnel-shaped; sepals 4--7 cm, 15--30 mm wide, obovate; petals 3--6 cm, 8--18 mm wide, obovate; ovary triangular, style branches 30--48 mm, crests 9--13 mm, stigmas triangular.
Ecology: Common. Grassy slopes in part shade on forest edge; Elevation: 90--600 m. Bioregional Distribution: n NCo, KR (Del Norte Co.); Distribution Outside California: southwestern Oregon. Flowering Time: Apr--May
Unabridged Note: Wilson et al. (1990 Madroño 37:113--123) reported no evidence of hybrid origin.
eFlora Treatment Author: Carol A. Wilson
Jepson Online Interchange
Previous taxon: Iris tenuissima subsp. tenuissima
Next taxon: Ixia
Citation for this treatment: Carol A. Wilson 2017. Iris thompsonii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=29321, accessed on February 22, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 22, 2017.